SN74ALVCH16841 Datasheet, PDF(1/10 Page) Texas Instruments – 20-BIT BUS-INTERFACE D-TYPE LATCH WITH 3-STATE OUTPUTS

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SN74ALVCH16841 Datasheet, PDF (1/10 Pages) Texas Instruments – 20-BIT BUS-INTERFACE D-TYPE LATCH WITH 3-STATE OUTPUTS

SN74ALVCH16841

20-BIT BUS-INTERFACE D-TYPE LATCH

WITH 3-STATE OUTPUTS

SCES043D â JULY 1995 â REVISED FEBRUARY 1999

D Member of the Texas Instruments

Widebus â¢ Family

D EPICâ¢ (Enhanced-Performance Implanted

CMOS) Submicron Process

D ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

D Latch-Up Performance Exceeds 250 mA Per

JESD 17

D Bus Hold on Data Inputs Eliminates the

Need for External Pullup/Pulldown

Resistors

D Package Options Include Plastic 300-mil

Shrink Small-Outline (DL) and Thin Shrink

Small-Outline (DGG) Packages

description

This 20-bit bus-interface D-type latch is designed

for 1.65-V to 3.6-V VCC operation.

The SN74ALVCH16841 features 3-state outputs

designed specifically for driving highly capacitive

or relatively low-impedance loads. This device is

particularly suitable for implementing buffer

registers, unidirectional bus drivers, and working

registers.

The SN74ALVCH16841 can be used as two 10-bit

latches or one 20-bit latch. The 20 latches are

transparent D-type latches. The device has

noninverting data (D) inputs and provides true

data at its outputs. While the latch-enable (1LE or

2LE) input is high, the Q outputs of the

corresponding 10-bit latch follow the D inputs.

When LE is taken low, the Q outputs are latched

at the levels set up at the D inputs.

DGG OR DL PACKAGE

(TOP VIEW)

1OE 1

1Q1 2

1Q2 3

GND 4

1Q3 5

1Q4 6

VCC 7

1Q5 8

1Q6 9

1Q7 10

GND 11

1Q8 12

1Q9 13

1Q10 14

2Q1 15

2Q2 16

2Q3 17

GND 18

2Q4 19

2Q5 20

2Q6 21

VCC 22

2Q7 23

2Q8 24

GND 25

2Q9 26

2Q10 27

2OE 28

56 1LE

55 1D1

54 1D2

53 GND

52 1D3

51 1D4

50 VCC

49 1D5

48 1D6

47 1D7

46 GND

45 1D8

44 1D9

43 1D10

42 2D1

41 2D2

40 2D3

39 GND

38 2D4

37 2D5

36 2D6

35 VCC

34 2D7

33 2D8

32 GND

31 2D9

30 2D10

29 2LE

A buffered output-enable (1OE or 2OE) input can be used to place the outputs of the corresponding 10-bit latch

in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state,

the outputs neither load nor drive the bus lines significantly.

OE does not affect the internal operation of the latches. Old data can be retained or new data can be entered

while the outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The SN74ALVCH16841 is characterized for operation from â40Â°C to 85Â°C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Widebus and EPIC are trademarks of Texas Instruments Incorporated.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

â¢ POST OFFICE BOX 655303 DALLAS, TEXAS 75265

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